Given : secA(1−sinA)(secA+tanA)
1cosA(1−sinA)(1cosA+sinAcosA)...................(∵secA=1cosA)
(1−sinAcosA)(1+sinAcosA)
1−sin2Acos2A
As, 1−sin2A=cos2A
cos2Acos2A =1
Prove the following trigonometric identities:
sec A(1−sin A)(sec A+tan A)=1